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Expanding type flame-resistant silicone sealant and preparation method thereof

A technology of silicone sealants and manufacturing methods, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve problems such as loss of personnel and property, lack of expansion performance, inconvenient maintenance of pipelines and cables, etc., to improve production Efficiency, simple manufacturing method, and the effect of reducing loss

Inactive Publication Date: 2010-01-20
陈世龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing fireproof blockages use organic fireproof blockages and inorganic fireproof blockages. Organic fireproof blockages are made of organic synthetic resins as binders, and are made of fireproof flame retardants and fillers. Because they contain toxic volatiles, It is forbidden to be used in some places with strict environmental requirements; inorganic fireproof blockage is made of inorganic binder as base material, and is made of inorganic refractory materials and flame retardants. Although it is non-toxic, it will solidify after the sealing is completed. When the pipes and cables and other wall-penetrating objects are repaired and replaced, the blocking objects need to be knocked out, which is very inconvenient for the maintenance of pipes and cables
[0004] Furthermore, the existing fireproof sealing materials basically do not have significant expansion properties except for the slight expansion of the fire retardant package. When a fire occurs, flames and poisonous gases may pass through plastic pipes, cable insulation, etc. after ablation. The remaining pores spread, causing heavy losses to people and property

Method used

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  • Expanding type flame-resistant silicone sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Add 100 parts by weight of α, ω-dihydroxypolysiloxane (hereinafter referred to as part) with a viscosity of 20 Pa.s at 25°C, 200 parts each of surface-treated magnesium hydroxide powder and aluminum hydroxide powder to the kneading Mix and dehydrate for 360 minutes at a temperature of 150° C. and a vacuum of 0.1 MPa in the machine, and obtain a base material after cooling. At room temperature, add the base material into the planetary mixer, and then add 20 parts of expanded perlite, 2 parts of polydimethylsiloxane, 8 parts of methyltrimethoxysilane, γ-aminopropyltriethoxysilane Add 4 parts and 3 parts of isopropyl titanate into a planetary mixer together with the base material for a chemical reaction at a vacuum degree of 0.08 MPa and a speed of 80 rpm for 4 hours to make an intumescent silicone sealant for fire prevention and sealing. The product performance test results are shown in Table 1.

Embodiment 2

[0057] Add 100 parts of α, ω-dihydroxypolysiloxane with a viscosity of 20 Pa.s at 25°C, 100 parts of surface-treated magnesium hydroxide powder and aluminum hydroxide powder into the kneader at a temperature of 110°C , mixed and dehydrated for 300 minutes under a vacuum of 0.08MPa, and obtained a base material after cooling. At room temperature, add the base material into the planetary mixer, and then add 10 parts of expanded vermiculite, 1 part of polydimethylsiloxane, 3 parts of methyltrimethoxysilane, γ-aminopropyltriethoxysilane 2 parts and 2 parts of isopropyl titanate were added to a planetary mixer together with the base material for a chemical reaction at a vacuum degree of 0.09 MPa and a rotation speed of 60 rpm for 4 hours to make an intumescent silicone sealant for fire prevention and sealing. The product performance test results are shown in Table 1.

Embodiment 3

[0059] Add 100 parts of α, ω-dihydroxypolysiloxane with a viscosity of 20 Pa.s at 25°C, 70 parts of surface-treated magnesium hydroxide and aluminum hydroxide powder into the kneader at a temperature of 160°C, vacuum Mix and dehydrate for 250 minutes at a temperature of 0.06 MPa, and obtain a base material after cooling. At room temperature, add the base material into the planetary mixer, then add 15 parts of expanded graphite, 2 parts of polydimethylsiloxane, 5 parts of methyltrimethoxysilane, 2 parts of γ-aminopropyltriethoxysilane Parts, 4 parts of isopropyl titanate were added to the planetary mixer together with the base material for a chemical reaction at a vacuum degree of 0.06MPa and a speed of 50 rpm for 4 hours to make a silicone sealant for expansion and fire prevention. The product performance test results are shown in Table 1.

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Abstract

The invention relates to a flame-resistant sealing material for an opening of a building penetrated object and a preparation method thereof. The provided silicone sealant has better flame-resistant effect, larger expanding rate, lower flame spreading factor, low smoke and no poison. The provided preparation process has simple preparation method and lower consumption in the production process. The expanding type flame-resistant silicone sealant comprises the following raw materials in parts by weight: 100 parts of alpha, omega-dihydroxyl-polyorganosiloxane, 1-50 parts of polydimethylsiloxane, 120-400 parts of flame-resistant filler, 5-20 parts of expanding filler, 2-15 parts of cross-linking agent, 0.2-4 parts of silane coupling agent and 0.1-5 parts of catalyst, wherein the alpha, omega-dihydroxyl-polyorganosiloxane has the structural formula shown as above, n is equal to 50 to 2,000, and R is CH3-, CH3CH2- or phenyl. The preparation method comprises the following steps: (1) preparing a base material; and (2) compounding the sealant.

Description

technical field [0001] The invention relates to a fireproof sealing material for openings of building penetrations and a manufacturing method thereof, in particular to a novel environmentally friendly intumescent flame-retardant silicone sealant without halogen and a manufacturing process thereof. Background technique [0002] In the current commercial, civil and industrial and mining enterprise buildings, due to the needs of building interior use and building construction, many cable penetration holes, empty openings reserved for electrical equipment and Building gaps, if these penetration openings and gaps are not sealed with fire protection, once a fire breaks out, flames and smoke will spread through these penetration openings and gaps, and a single spark may develop into causing huge losses to personnel and property disaster. [0003] Most of the existing fireproof blockages use organic fireproof blockages and inorganic fireproof blockages. Organic fireproof blockages ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J9/00C09K3/10E04B1/66E04B1/94
Inventor 陈世龙
Owner 陈世龙
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